Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.355-3.4332.56-2.60
1
7.18
👆🏻
Fracture
Uneven
Uneven, ConchoidalWalter Schumann
Cleavage
{???} Good, {???} Good
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
Mohs Hardness
-99996-6.5
2
10
👆🏻
Chemical Composition
(Ca,Mn2+ ,Fe2+ ) 3Al 2BSi 4O 15(OH)Anthony et al , Handbook of mineralogy (2001)
Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8